Smoke-consuming furnace.



m l 6 2 V o N d e t n e t a P F. D E N H. c s G 6 5 6, 7 00 6 0 N SMOKEcousumme FURNACE.

(Afiplication filed Sept. 8, 1900.)

(No Model.)

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v UNITED STATES PATENT FFICE.

GUSTAV soHNEIDER, OF BE LIN-soHoNERERe, GERMANY.

SMOKE-CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 687,656, dated November26, 1901.

' Application filed $eptember 8, 1900. Serial No. 29,448. (No model.)

To aZZ whom it may concern:

Be it known that I, GUSTAV SCHNEIDER, merchant, a subject of the King ofPrussia, Emperor of Germany, residing at Berlin- Schoneberg, in theKingdom of Prussia, German Empire, have invented certain new and usefulImprovements in Smoke-Consuming Furnaces, of which the following is aspecification.

My invention relates to an improved smokeconsuming furnace which isintended to be used for any desired technical purposes. In the furnaceof my invention a perfect combustion of smoke is obtained by feeding thegrate with coal from below, so that the fresh supply of coal introducedis caused to be volatilized and burned by the super-incumbentincandescent coal, and the ascending gases are made to undergo completecombustion by the superincumbent layer of incandescent coal. Thesmoke-consuming furnaces hitherto in use are characterized by thecircumstance that the fresh coal is fed on the incandescent layer. Thesefurnaces therefore necessitate special means for causing the combustionof the incompletely-burned gases developed from the fresh coal. By wayof such special means among other arrangements, secondary furnaces orreintroduction of the smoke-gases into the furnace, have been employed.

The smoke-consuming furnace forming the subject-matter of my inventiondiffers from those above referred to by the circumstance that in it thecombustion of smoke is caused by stoking from below, the fresh coalbeing introduced from below and gradually forced upward between a pairof grates, one of which 1 is inclined as regards the perpendicular, and1 Figure 1 is a vertical section when stoking. Fig. 2 is a like viewwhen supplying the stoking arrangement with a supply of fuel. Fig. 3 isa front View.

The furnace consists of the back grate a, the front grate b, and thechamber 0. The ashes of the burned fuel are supposed to drop through thegrate a, which is situated in the direction toward which the fire-gasesare to be conducted and is placed in an oblique position in order tofacilitate the fall of the ashes. Grate bis intended for the admissionof air to the fuel and has a slight inclination toward theperpendicular.

d is the uppermost layer of fuel, which is always kept in anincandescent state.

Underneath this furnace a box 6 is provided, which serves for thereception and feeding forward of fresh coal for the purpose of stokingfrom below. This box is provided with a bottom f, which can be raised bybars 9 by any desired lever arrangement. Moreover, this box can revolvein any desired place on pivots or hinges h, so that it can be tiltedforward, so as to be brought into a suitable position for being suppliedwith coal, which is then introduced into the furnace from below byraising the bottom f, Figs. 1 and 2..

The box e is open above. In order to prevent the fuel from dropping outof the furnace when the box 6 is tilted, it is provided behind with anarched plate 2', which when the box is tilted forward shuts off thefurnace toward the front underneath the chamber 0, and thus forming, soto speak, while in this position the bottom of the furnace, Fig. 2.

The introduction of coal from below is offected as follows: Assumingthat by raising the bottom plate f up to the level of the lower edge ofthe furnace-chamber c the fuel contained in the box has been transferredinto the furnace, the box 6 is tilted forward, so that its back plate t'shuts oif the chamber a. The upper orifice of the box Will then beexposed toward the front, so that fresh fuel can be thrown into the box.The box is then tilted back into the position shown in Fig. 1, so thatits mouth is situated underneath the furnace-chamber, and the bottom fisthen raised in proportion as the coal is consumed, thus introducing thefuel into the furnace from below. This stoking from below can also beeffected in another way by forcing up the material from below bysuitable means, after the manner of a mole-hill, the heap of coal thusintroduced thereupon spreading the gases generated in the lower part ofthe.

feed-body is effected by inclosing the fuel, a chamber, a rear grateextending upwardly at an inclinationfrom said chamberand adapted topermit of the removal of the slag, a-

front grate extending upwardly at an inclination from said chamber andin an opposite direction to that of the rear'grate and adapted to seryeas an air-passage to cause the gases'generated in the fuel contained inthe chamber to pass through the incandescent portion of the fuel lyingon a higher level,

said grates adapted to prevent the fuel from spreading as it leaves saidchamber, and means for feeding the fuel to the said chamber,substantially as herein shown and described and for the-purp0ses setforth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

I GUSTAV SCHNEIDER.

WVitnesses: 1

WOLDEMAR HAUPT, HENRY HASPER.

